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Autres articles (25)
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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...) -
Librairies et logiciels spécifiques aux médias
10 décembre 2010, parPour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)
Sur d’autres sites (2772)
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Revision 6b1b341774 : Merge "fixed an enc/dec mis-match issue" into experimental
20 février 2013, par Yaowu XuMerge "fixed an enc/dec mis-match issue" into experimental
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Cannot open ".mp4" video files using OpenCV 2.4.3, Python 2.7 in Windows 7 machine
28 décembre 2015, par tjmonsiI am currently working on a project that involves reading mp4 video files.
The problem I encountered is that it using Python 2.7 (32 bit), OpenCV 2.4.3 (cv2.pyd) in a Windows 7 machine.The code snippet is as follows :
try:
video = cv2.VideoCapture("video.mp4")
except:
print "Could not open video file"
raise
print video.grab()"
video.grab()
" always returns false : meaning it doesn’t read the file "video.mp4
"
But when we try this :try:
video = cv2.VideoCapture("video.avi")
except:
print "Could not open video file"
raise
print video.grab()"
video.grab()
" returns true : meaning it is able to read ".avi
" files.Another is we have tried this same snippet on Linux and Mac and it seems to work fine, meaning it is able to read both mp4 files and avi files.
This problem is similar to this problem and this problem. Both still don’t have a clear and workable answer.
I would appreciate any help or workaround aside from just using Linux or Mac for programming this as I need this to work on all three systems.
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Displaying Bitmaps sequentially, "like a video"
15 juillet 2015, par WamasaI’m trying to reproduce a video that is not android supported (like a .wmv video) in my app, and actually I’m able to grab every frame and create a Bitmap of it.
So, now, I’m trying to show those bitmaps in a VideoView (or any other view), sequencially, something like a video.
Some code :
while (true) {
frame = frameGrabber.grab();
if (frame == null)
break;
frame2 =
IplImage.create(frame.width(), frame.height(),
opencv_core.IPL_DEPTH_8U, 4);
opencv_imgproc.cvCvtColor(frame, frame2,
opencv_imgproc.CV_BGR2RGBA);
bm =
Bitmap.createBitmap(frame2.width(),
frame2.height(), Bitmap.Config.ARGB_8888);
bm.copyPixelsFromBuffer(frame2.getByteBuffer());
canvas = new Canvas(bm);
mVideoView.draw(canvas);
canvas.save();It looks like I can grab every frame of the video (using ffmpeg), but I just don’t know how to display them.
By the way, I’ve already tried encoding this video to a .mp4 file and playing it on the VideoView, but it takes much time to process the whole video (1 hour), so, now, I’m trying to display it right away, without encoding it do .mp4 (or any other android supported video)
Any advices ?